Hook up Autofill Backend interface to SyncableServices

components/webdata/common/web_data_service_backend.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/webdata/common/web_data_service_backend.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "components/webdata/common/web_data_request_manager.h"
 #include "components/webdata/common/web_database.h"
@@ skipping 74 matching lines @@
 void WebDataServiceBackend::DBReadTaskWrapper(
     const WebDatabaseService::ReadTask& task,
     scoped_ptr<WebDataRequest> request) {
   LoadDatabaseIfNecessary();
   if (db_ && init_status_ == sql::INIT_OK && !request->IsCancelled()) {
     request->SetResult(task.Run(db_.get()).Pass());
   }
   request_manager_->RequestCompleted(request.Pass());
 }
 
+void WebDataServiceBackend::GetDatabaseAsync(
+    const WebDatabaseService::DBCallback& callback) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::DB));
+  if (!db_ || init_status_ != sql::INIT_OK)
+    callback.Run(base::WeakPtr<WebDatabase>());
+  else
+    callback.Run(db_->AsWeakPtr());
+}
+
 WebDataServiceBackend::~WebDataServiceBackend() {
   ShutdownDatabase(false);
 }
 
 void WebDataServiceBackend::Commit() {
   if (db_ && init_status_ == sql::INIT_OK) {
     db_->CommitTransaction();
     db_->BeginTransaction();
   } else {
     NOTREACHED() << "Commit scheduled after Shutdown()";
   }
 }